The RSS feed on my site works again. I’m not sure how long it was broken. I generate this site using relative URLs in order to accommodate I2P, Tor and Zeronet users. That inadvertently caused the XML for RSS to also use relative links. RSS doesn’t support relative links because it has no way of knowing the URL from only the XML data. I patched it so the XML now uses absolute links.
Sorry to anybody using RSS! ¯(ツ)/¯